Daikin RXYQ96PYDN, Руководство по обслуживанию

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Special Control SiUS34-801A_b
54 VRVIII R-410A Heat Pump 60Hz
7.3.2 Heating Oil Return Operation
[Start conditions]
Referring to the following conditions, start heating oil return operation.
• Integral oil rise rate is reached to specified level.
• When cumulative compressor operating time exceeds 8 hours (2 hours when the power supply turns ON for the
first time)
Furthermore, the integral oil rise rate is calculated by Tc, Te, and compressor loads.
The higher the compressor operating step No., the cumulative refrigerant oil consumption increases.
When high pressure reaches the high level (i.e., Pc > 27k), the system will switch to defrost operation (refer to Section 7.4
for detail).
Cooling indoor unit actuator Oil return operation
Fan
Thermo ON unit Remote controller setting
Unit not in operation OFF
Thermo OFF unit Remote controller setting
Motorized valve
Thermo ON unit Normal opening degree
Unit not in operation 192pls
Thermo OFF unit Normal opening degree for forced thermostat ON
Actuator Symbol
Elect. symbol
Oil return operation
RXYQ
144PTJU
For any model
other than that
shown on the left
Compressor 1
—
M1C M1C
Maintain load that was applied before oil return operation.
When current circulation rate < circulation rate required
for oil return operation, turn ON the STD compressor
every 10 seconds (up to 3 units at maximum).
Compressor 2 M2C M2C
Outdoor unit fan 1
—
M1F M1F
When outdoor unit heat exchanger is condenser, the
fan will run under cooling fan control.
When outdoor unit heat exchanger is evaporator, the
fan will run at the fan step 7 or 8.
Outdoor unit fan 2 M2F —
Electronic expansion
valve (main)
EVM
Y1E
Y1E
20SA=ON : PI control
20SA=OFF : 418pls
Y3E
Electronic expansion
valve (subcooling)
EVT
Y2E
Y3E PI control
Y5E
Electronic expansion
valve (refilling refrigerant)
EVJ Y4E Y2E 80pls
Four -way valve (for heat
exchanger selection)
20SA
Y2S
Y3S
When outdoor unit heat exchanger is condenser, the
valve will turn OFF.
When outdoor unit heat exchanger is evaporator, the
valve will turn ON.
Y9S
Four
-way
valve (for high-
and low-pressure gas
pipe selection) 20SB Y8S Y2S OFF
Solenoid valve (main
bypass)
SVE
Y5S
Y6S OFF
Y10S
Solenoid valve (hot gas) SVP Y4S Y5S 0pls
Solenoid valve (liquid
pipe of refrigerant
regulator)
SVL Y3S Y4S 0pls
Solenoid valve (gas
discharge pipe of
refrigerant regulator)
SVG Y1S Y1S 0pls
Solenoid valve (drain pipe
of refrigerant regulator)
SVO Y7S Y7S 0pls
Solenoid valve (discharge
pipe of refrigerant
regulator)
SVT Y6S Y8S 0pls
OR